Department of Chemical and Biomolecular Engineering, University of California , Berkeley, California 94720, United States.
Department of Chemical Engineering, National Tsing-Hua University , Hsinchu 30013, Taiwan.
ACS Appl Mater Interfaces. 2015 Dec 9;7(48):26658-65. doi: 10.1021/acsami.5b08423. Epub 2015 Nov 20.
We demonstrate a symmetric supercapacitor by using yttria-stabilized zirconia (YSZ) as the electrolyte and silicon carbide nanowires (SiC NWs) as the electrode. The stacked symmetric SiC NWs/YSZ/SiC NWs supercapacitors exhibit excellent thermal stability and high areal capacitance at temperatures above 300 °C. The supercapacitor functions well at a record high temperature of 450 °C, yielding an areal capacitance of 92 μF cm(-2) at a voltage scan rate of 100 mV s(-1). At this temperature, it is also capable of withstanding current densities up to 50 μA cm(-2), yielding a maximum areal power density of 100 μW cm(-2). Good cycling stability is demonstrated with a capacitance retention of over 60% after 10,000 cycles at the operation temperature of 450 °C and a scan rate of 200 mV s(-1).
我们展示了一种对称超级电容器，它使用氧化钇稳定氧化锆（YSZ）作为电解质，碳化硅纳米线（SiC NWs）作为电极。堆叠的对称 SiC NWs/YSZ/SiC NWs 超级电容器在 300°C 以上的温度下表现出优异的热稳定性和高面电容。超级电容器在创纪录的高温 450°C 下运行良好，在 100 mV s(-1) 的电压扫描速率下，面电容为 92 μF cm(-2)。在这个温度下，它还能够承受高达 50 μA cm(-2)的电流密度，产生 100 μW cm(-2)的最大面功率密度。在 450°C 的工作温度和 200 mV s(-1)的扫描速率下，经过 10,000 次循环后，超级电容器的电容保持率超过 60%，表现出良好的循环稳定性。
